콘텐츠 본문
논문 해외 국제전문학술지(SCI급) MULTILEVEL INVERTER USING CASCADED 3-PHASE TRANSFORMERS WITH COMMON-ARM CONFIGURATION
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2011-08
- 저자명 정연호공동(참여),PARK, SJ (PARK, SUNG-JUN),KANG, FS (KANG, FEEL-SOON),SONG, SG (SONG, SUNG-GEUN)
- 학술지명 ELECTRIC POWER SYSTEMS RESEARCH
- 발행처명 ELSEVIER SCIENCE SA
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
논문 초록 (Abstract)
In multilevel inverter development for 3-phase applications, total number of transformer in the circuit can be reduced by using of cascaded 3-phase transformer circuit instead of single-phase transformer circuit. In the scheme, total number of switching components in the circuit is still a drawback to achieve lower cost and smaller size of the inverter compared with conventional multilevel inverter. This paper includes a challenging method to reduce total switching components in the multilevel inverter by adopting common-arm structure. The proposed inverter has been operated by two control schemes, Newton–Raphson and Equal-area method. After theoretical and experimental comparison of the methods, we found that Newton–Raphson method is useful to eliminate a specific harmonic order. However, the method has a shortcoming in real time operation which is performed by iterative calculation of the nonlinear equations. With Equal-area method, we can easily find the switching angles by calculating a trigonometric function. It can sufficiently minimize Total Harmonic Distortion (THD) of output voltage in real time operation of Digital Signal Processor (DSP).
